Improvement in marine steam-engine governors



@uitrit gratta gettati @fitta EDWARD M. TROTH, OF NEW YORK, N. Y.,AASSIGNOR T0 HIMSELF AND JOHN A. SEGOB, OF THE SAME PLACE.

Letters Patent No. 72,939, dated .December 31, 1867.

alge Scintille maar fait .Hirse Entes ntmt :mt milling peut nf tigesans.

VTO ALL WHOM IT MAY CON CERN Be it known that I, EDWARD M. TROTII, ofthe city, county, and State of New York, have invented a new andimproved Governor for Marine Steam-Engines; and I do hereby declare thatthe following is a full, clear, end exaet description thereof, whichwill enable others skilled in the art to make and'use the same,reference being had to the accompanying drawings, forming part of thisspeciieation,in which the drawing represents a. front elevation, partlyin section, of my invention.

The object of this invention is a device by means of which the supply ofsteam to an engine on a propeller- Steamship will be automatically cutoil','whenever the propeller` is raised out of the water, to prevent itsrevolving in the air, and the c onsequent'destruction or injury of themachinery.

` The invention consists in a pendulum, connected with the slide-valveof a steam-chest, so that, when the pendulum is brought out of itsvertical position and swings towards the bow of the vessel, it willoperate the slide-valve, so that the steam will operate upon the pistonin a small cylinder, in such a manner that the throttlevalve will beclosed.

A represents a small steam'cylinder, in which a piston, B, is arranged,which is provided with a piston-ro'd, C, as is clearly shown in thedrawing. The piston-rod 'is connected to a rod, D, which operates acrank, E, of a valve, F. The latter is arranged in the steam-supply pipeG of the steam-engine. The cylinder A is.so placed in the vessel, inwhich the whole machine is arranged, that its head, a, (in which thepacking-box is,) is nearest the stern Aof' the shipywhile the oppositehead b is nearer the bowof the same. When the piston stands close to thehead a, the throttle-valve will be open, while the same will be closedwhen the piston-rod is drawn in and the piston touches the bead b of thecylinder. L is a steam-chest, arranged above the cylinder, as shown.

' lwo parts, c and d, connect the steam-chest with the ends of thecylinder A. His a slide-valve in the chest L,

by which the passage of the steam through the ports is regulated. Thisvalve is connected with a pendulumrod, I, by a jointed bar, K, as 'sclearly shown.

The pendulum-rod is pivoted at its upper end to a stationary frame inthe vessel, and when it hangs perpendicular, the valvcH will cover theport c, and admit the steam into the cylinder' through the port d. Thepiston is thereby forced towards the head a, and the throttleralve isopen, whereby the machinery is kept running. Should the bow of thevessel be raised out of the water, andthe screw be the deeper immersedin the same, the pendulum will swing towards thc stern of the vessel,thereby moving the valve H in the same direction, the port c willthereby be still kept closed, and the port d open, and consequently thethrottle-valve will 'be kept open. But when the screw of the ship israised out of. water, the pendulum vwill swing forward and will Vpullthe valve, so as to cover the port d and admit steam into the cylinder Athrough the port c. The piston will thus be forced towards the head b,and the throttle-valve will be closed. The supply of steam to thedriving,- engine will thus be stopped, as soon as thc screw is out of'the water, and will be at once restored when the pendulum reaches itsperpendicular position. i

I am aware that pendulums for stopping the engines, when thc screw of aSteamship is raised out of water, have been used, but the pendulum canhardly be .made heavy enough to close by its own direct action thethrottle-l valve of a steam-supply pipe on a large ships engine. It isthought strong enough, without being very heavy,

to move the balanced slide-valve in a smull steam-chest, and the actionof the steam upon the piston willv be suicicntly powerful toppen orclose the throttle-valve, as the case maybe.

I do not claim the pendulums for the purpose of closing thethrottle-valve of a ships engine, but

I do claim, and desire to secure by Letters PatentrI he combination ofvthe pendulum with the slide-.valve H, steam-chest L, steam-cyliuder A,and piston B and with the piston-rod'C, and connecting-rod D, all .madeand operating substantially as and for the purpose herein shown anddescribed. l

.EDWARD M. TROTH.

Witnesses:

WM. F. McNAMAnA, ALEX. F. ROBERTS.

